# VTK 9 in Release 4.8.1

**URL:** <https://discourse.slicer.org/t/vtk-9-in-release-4-8-1/3585>\
**Category:** Development\
**Tags:** build\
**Created:** [July 26, 2018, 3:57pm UTC](https://discourse.slicer.org/t/vtk-9-in-release-4-8-1/3585 "2018-07-26T15:57:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jonieva](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@jonieva](https://discourse.slicer.org/u/jonieva)\
**Post date:** [July 26, 2018, 3:57pm UTC](https://discourse.slicer.org/t/vtk-9-in-release-4-8-1/3585/1 "2018-07-26T15:57:19Z")

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Hi there,

I am aware that only VTK 9 is supported since Slicer 4.9, but what about the 4.8.1 release? I’m trying to build it with a lower version of VTK and I get the following error:

/Users/jonieva/Projects/Slicer/Modules/Loadable/VolumeRendering/MRMLDM/vtkMRMLVolumeRenderingDisplayableManager.cxx:52:10: fatal error: ‘vtkMultiVolume.h’ file not found  
#include \<vtkMultiVolume.h\>  
^  
Scanning dependencies of target qSlicerVolumeRenderingModuleWidgets  
1 error generated.  
make[5]: \*\*\* [Modules/Loadable/VolumeRendering/MRMLDM/CMakeFiles/vtkSlicerVolumeRenderingModuleMRMLDisplayableManager.dir/vtkMRMLVolumeRenderingDisplayableManager.cxx.o] Error 1  
make[4]: \*\*\* [Modules/Loadable/VolumeRendering/MRMLDM/CMakeFiles/vtkSlicerVolumeRenderingModuleMRMLDisplayableManager.dir/all] Error 2

Does this mean that VTK 9 is mandatory for 4.8.1 too?

Thank you.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 26, 2018, 4:25pm UTC](https://discourse.slicer.org/t/vtk-9-in-release-4-8-1/3585/2 "2018-07-26T16:25:22Z")

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vtkMultiVolume is not used in 4.8 branch (master-48), so if you get this error then probably you are not compiling the correct branch.

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**Author:** ![jonieva](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@jonieva](https://discourse.slicer.org/u/jonieva)\
**Post date:** [July 26, 2018, 4:45pm UTC](https://discourse.slicer.org/t/vtk-9-in-release-4-8-1/3585/3 "2018-07-26T16:45:04Z")

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You are absolutely right. I messed up with the branches.

Thx!